This puzzle design is the further development of the puzzle "0036: SixPack". The puzzle "SixPack" 'just' uses 2 bars at each of the six outer faces to make a cube (and use some rare inner cubes for blocking), while the "CubeLock" has 3 bars at each of the six outer faces of the cube. This leads to an underlying cubic 5x5x5 grid. The additional pieces inside the cube are used such that while trying to assemble the pieces you need to find out in which order they go together. Maybe also some linear moves are required.

To make it more beautiful the puzzle consists of six pieces: there is a first set of 3 pieces, and the second set of 3 pieces consists of the mirror images of the pieces in the first set. Here there's a picture of them:

Tom Lensch made this very special and beautiful CubeLock puzzle for me - which is a great honor.